Spammed by "Esquire" theme?

After previewing (not activating) the "Esquire" theme, I returned to my site and something called "The Esquire Theme" is now listed as one of my blogs. I can't find a way to delete this, as it's somehow linked to my primary (and only) blog. The URL for the bogus blog is esquiredemo.wordpress.com.

Has spamming now invaded the WordPress theme section as well?

Any help would be appreciated, as I'd really like to remove this from my site.